Question

HELP
Resolva a equação irracional

a) √x+6 = 8

b) √6-x + x = 0

Answer 1

a)√x+6=8=>√x=8-6=>√x=2=>x=2²=>x=4

b)√6-x+x=0=>-x+x=6²=>-x+x=36

Answer 2

$\sqrt{x} +6 = 8 --\ \textgreater \ \sqrt{x} = 8-6 --\ \textgreater \ \sqrt{x} = 2$
$( \sqrt{x} )^2 = 2^2 --\ \textgreater \ x = 4$

Se for assim:
$\sqrt{x +6} = 8$

$( \sqrt{x+6} )^2 = 8^2 --\ \textgreater \ x+6 = 64 --\ \textgreater \ x = 64 - 6 --\ \textgreater \ x = 58$
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